Next.js Express Server with next-routes

server.js

const express = require('express')
const bodyParser = require('body-parser')
const next = require('next')
const cookieParser = require('cookie-parser')
const routes = require('../universal/routes')

const dev = process.env.NODE_ENV !== 'production'
const app = next({ dev })
const handle = app.getRequestHandler()
const routeHandler = routes.getRequestHandler(app)
const server = express()
const port = 3000

module.exports = app
  .prepare()
  .then(() =>
    server
      .use(bodyParser.json())
      .use(bodyParser.urlencoded({ extended: true }))
      .use(cookieParser())
      .use(routeHandler)
      .get('*', (req, res) => handle(req, res)),
  )
  .then(() => server.listen(port, () => console.log(`> Ready on http://localhost:${port}`)))
  .catch(err => {
    console.error(err)
    process.exit(1)
  })